
Syrian children sing during an event held by the UN refugee agency (UNHCR) to mark the International Day for Humanitarian Work at the Opera House, Damascus, capital of Syria, on Aug. 19, 2015. (Xinhua/Ammar)

Syrian children sing during an event held by the UN refugee agency (UNHCR) to mark the International Day for Humanitarian Work at the Opera House, Damascus, capital of Syria, on Aug. 19, 2015. (Xinhua/Ammar)